Tire-mold.



H. S. PATTON.

TIRE MOLD.

APPLICATION FILED MAR. 27, |914.

Patented May 30,1916.

A TTOR/VY l HERBERT S. PATTON, 0F ALAMEDA, CALIFORNIA.

TIRE-MOLD.

Specification of Letters Patent.

Patented May 30, 19161' Application led March 27, 1914. Serial No. 827,700.

To all whom t may concern:

Be it known that I, HERBERT S. PATTON, a citizen of the United States, residing at Alameda, in the county of Alameda and State of California, have invented certain 4mold can be adapted for a large number of tires. In use I find it advantageous to employ three molds which with suitable liners will accommodate all-the standard size tires at present in use, thus enormously cutting down the lequipment required for small tire factories and repair shops.

Other objects of my invention are to provide improved means of curing the tire while in the mold, and means for lifting the upper mold member.

With these-.and other objects in view my invention consists in the novel construction and arrangement -of parts as herein illustrated and as more specifically pointed out in the appended claims.

Reference should be had to the accomlpanying drawing forming a part of this one side of the mold showing the same arranged for a tire having thef same outside diameter as that illustrated in Fig. 2, but having alarger cross sectional area, and Fig. 4 is a cross sectional view of one side of the moldshowing the same arrangedfor a tire of smaller diameter and larger cross section than that made in the mold as illustrated in Fig. 2, also showing a t1re in place and a pneumatic core positioned within the same.

Denoting corresponding parts by the same numerals of reference, 1 denotes a circular caslng having the annular L-shaped section lnterior cavity 2, the walls 3 and 4, which are connected by the arc whose radius is that of the tire having the smallest cross section, which is to, be made in this mold.

The top of the mold 6 is provided with an annular cavity 7 ,u and this member lits closely within the vertical wall 3 and is provided with the depending arc shaped portion 8 having the same curvature as arc 5, and when the top is in its lowest position 4forms a continuation therewith. The top is also provided with a 'fiat surface 9 tangent to the upper part of curve 8, and eX- tending inwardly the same distance as the wall 4 tangent to the curve 5. Seated on these. flat surfaces'is a bead molding made in two halves 10, the said molding being provided with curved portions 12 corresponding to the curve of the sides ofthe tire and a recess 13' corresponding to the shape of the bead-,on the tire. If the tire is not of the clencher type then these latter recesses are omitted and straight sides provided. f'rom the .curve 12 corresponding to the shape of the straight sided tires.

l Annular ribs 14 are formed on the inside ofeach half molding and bolts 15 extending through these ribs hold the two parts to- -gether and clampthem on to the tire. The

cavities 2 and 7 are adapted to contain dry steanf for the purpose of heating the metal and curing the tire.

The numerals 16 and 17 denote respectively, the steam inlet and outlet for cavity 2, while 18 and 19 respectively, denote the inlet and outlet for cavity 7 The latter y are formed on the inner edge of the top 6 and extending upwardly therefrom are arms attached to a plate 26. The latter plate is bolted to a hollow disk27 and revolubly mounted inthe cavity therebetween is a flanged sleeve-28 to which is keyed a hand' wheelA 29. The sleeve 28 is screw threaded and engages the screw 23.

It will be apparent that by rotating wheel 29 the sleeve 28 will be raised on the screw threads 23 and through the extension flange 28 of sleeve 28 will .lift the arms 25 and the upper part of the mold.

Now in order to adapt this mold to tires of greater cross section, but of the same diameter, I remove the bead moldings 10 and substitute therefor other bead moldings as 10 having curved portions 12 v struck from a center of smaller diameter than that from which the curves 12 are struck and a width greater than the width of moldings 1Q thus raising the top of the mold a corresponding amount Iupwardly and leaving a short tangent between the curves 5 and 8. Thus if the mold as illustrated in" Fig. 2, is adapted for a 37X4 tire, the mold asv illustrated in Fig. 3 would, be adapted say fork a 37x45;

tire and `by placing a third and thicker pair of bead moldings therein a. 37X5 tire could be, made.

To adapt the mold to a tire having. a smaller tread diameter I provide annular liners 30 in the shape of a semi-crescent,

which are placed against the outside curves 5 and 8 of the mold. By the use ofthese crescents alone the thread diameter is reduced, itof course. being necessary at the same time touse a set of bead molds hav- .lng a correspondingly decreased diameter and if a tire is to be repaired for a smaller tread diameter than the moldbut a larger cross. diameter than illustrated in Fig. 2, then I employ the crescent shaped liners 30 together with one or more annular rings 31,

thus if the mold shown in Fig. 2 is arranged p for 372:4 tires then by 30 having a `thickness of at their center placing therein liners and two rings 31 eachfx then a 36x5 e tire can be made.

especially stron- `In order Ito cause the -tire to'l completely fill the mold I provide a pneumatic core of construction'as shown at 32, the said core eing placed within the tire before the latteris placed in the mold. A connection 33.1eads to a suitable ksource of supply for inlating this core..

In use the pneumatic core 32, is placed with thetire casing and the'latterarranged with the bead in the recess of the lower half of the bead molding, the upper half then-being placed thereon and clam ed by bolts 15.

, -These parts are then lace in the mold 1 the hand wheel 29. A This not only lowers` and the top 6 lower thereon Abyturning the top, but also forms an effective clamp means for holding the top against the eX-.

with their respective tops, two pair of crescent'shape liners for each, four rectan lar rings, for each and a pair of bead mol ings are suflicient.. l

As previously stated this device is particularly adapted for retreading and rebuilding old tires and while I have shown the preferred embodiment of my invention it will be understood that various minor changes may be made in the several arts without departing from the scope o the claims.

What I claim is:

1. A tire mold comprising an L-shaped section annular base, a curve connecting the vertical and horizontal walls of said base; a top for said mold, said top formed with a horizontal wall and a depending curve on the outer edge thereof, the said irstand said second mentioned curves conformin to the contour of the tread portion of the t1re; a divided bead molding adapted to be clamped between the horizontal walls of said base and said top, curves formed on4 the outer edges of said molding adapted to conform to the side walls of the tire, and means for clamping together said base, molding and top. i

2. A tire mold comprising an L-shaped section annular base, a steam cavity in said base, a ring shaped topadapted to fit within the vertical portion of sald base, a steam i cavity in'said top, curves formed in said'base and said top adapted to conform to the tread portion of the tire,`- a bead moldin formed in two halves and having curved portions conforming to the sides and bead o f the tire and means for' clam ing said molding betweenl said base and said top.

3. A tire mold comprising an L-shaped section annular base, a, ring shaped top adapted-to lit within the vertical wall of said base, said base and top having curves conforming to the tread portion of the tire,`

divi-ded bead moldings adapted to be clamped between said top and sald base, and an' nularfliners seml-crescent in section adapted to fit the outer curved walls of said top and said. base to decrease the tread diameter of said tire mold. 1 f

4. In alitire mold comprising the combination with' abuse, a top and interchangeable bead moldings adapted to be clamped between said base and said top, of annular liners of semi-crescent section tting within the tread portion of the mold and rings fitting between the said 'liners for the purpose of adapting said mold to tires of smaller tread dlameter and greater cross section.

HERBERT s. PATTON.

Witnesses:

EDITH G. PATTON,

A.v STOCK. 

